Also in the IDE files menu there is a preference section that tells you where and what user's sketch folder name the IDE is looking to find any sketch folders that contain sketches of the same name as the folder name. So check your preference location to see if that is where you actually have your sketch folders located at and if not change the preference location.
My preference path when running arduino IDE 1.0.3 is shown as:
C:\Documents and Settings\Primary Windows User\My Documents\Arduino\Arduino1
I change this ( to C:\Documents and Settings\Primary Windows User\My Documents\Arduino ) when I want to run a older version of the IDE where I have sketches not yet check out for arduino 1.x compliance.
Lefty